Half to harvey s



2 Sheets-Sheet 1.

(No Model.)

B. SHYDEOKER.

STEAM BOILER FURNACE.

Patented May 7, 1895.

2 Sheets-Sheet 2 (No Model.)

B. SHYDBGKER. STEAM BOILER FURNACE.

No. 538,885. Patented May 7, 1895.

e v E 7 J aw fv O V I mwo mw m M mmwm y W .fi mw a T mm v O A a V 4 Ow m ma m mm m TAM UNITED STATES PATENT OFFICE.

EUGENE SIIYDECKER, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- IIALF TO HARVEY S. BROW'N, OF SAME PLACE.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 538,885, dated May '7, 1895.

Application filed February 19, 1895. Serial No. 538,975. (No model.)

To whom it may concern. these tubes are coils of wire, as shown at I,

Be it known that LEUGENE SHYDEOKEE, a these coils being so arranged as to conduct citizen of the United States, residing in the a current of electricity which is brought to city and county of San Francisco, State of them by means of suitable wires as shown at California, have invented an Improvement in J, Fig. 1.

Steam-Boiler Furnaces; and I hereby declare The rear ends of the tubes H are permathe following to be a full, clear, and exact denently closed, passing through or into the rear scription of the same. end of the boiler, as shown in Fig. 1, while My invention relates to improvements in the front ends open into the chamber or space IO steam boilers and in furnaces designed to b E at the front, and may be reached by removused therewith. ing a door or cover K which normally closes It consists in details of construction which the chamber E. will be more fully explained by reference to The coils I are formed around a central the accompanying drawings, in whichcore, and may be surrounded by any suitable I5 Figure l is a vertical longitudinal section heat difiusing medium molded into proper taken through the boiler and furnace. Fig. form to fit loosely within the tubes H, so that 2 is a transverse section taken through no a: of Whenever iti's desired,thecoilsl may be drawn Fig. 1. Fig. 3 is atransverse section through out from the tubes for repairs or inspection, 3 y of Fig. 1. Fig. 4 is a transverse section by removing the door K and disconnecting zc through z of Fig. 1. Fig. 5 is an enlarged the wires .I. When in operation a powerful 7o longitudinal section of the grate-bar. Fig. 6 current of electricity from a dynamo or other is a transverse section of the same. source of supply is passed through the wires A is a boiler having a fire-place or furnace within these tubes, and as the wires are so B beneath the front end, a chamber 0 at the proportioned to the current passing that they 25 rear technically called a combustion chamoiferaconsiderableresistance,they are heated her, into which the products of combustion to a high temperature, and the heat thus profrom the fire-place are carried, as will be hereduced is diffused through the surrounding inafterdescribed,and return tubes Dthrough coating, and the tubes H within which the theboiler,throughwhichthe products of comcoils are contained, so that the water sur- 30 bustion pass to a chamber E at the front of rounding these tubes receives the heat thus the boiler, thence returning again through produced, and the additional heat from this tubes D to the chimney or Smokestack F sourcewillcorrespondinglyreduce theamount which extends upwardly at the rear of the of fuel necessary to be used upon the grate. boiler, and is separated from the chamber 0 IVithin the upper part of the boiler and in 5 byamovable non-conducting plate or damper the steam space thereof is asteam drum L, of 8 G. This movable damper may be opened desirable size, suitably supported entirely when a fire is to be started so as to give a di- Within the main boiler. This steam drum has rect draft from the furnace to the chimney or tubes or flues M passing through it, open at whenever the heat is so great as to make both ends, so that the steam produced within 40 steam too rapidly, it may be opened so that the main boiler A, will pass freely through the heat will pass directly up the chimney and the tubes M. not through the lines D and D of the boiler. N is a pipe opening at one end in the up- These fiues D and D are designed to pass perpart of the boiler A, and extending downthrough the water space of the boiler, and in ward below the drum L so that its opposite 45 order to increase the heating capacity, I have end opens into the interior of this drum L. shown an electrical heater which consists of The steam which arises from the water within a series of large tubes H passing longitudithe boiler is taken from the extreme upper nally through the boiler between the tubes D part of the boiler and delivered into the drum and D. There may be one, two or more series L where it is essentially separated from the 50 of the tubes II as is found desirable. Within wet steam continually arising from the boil- 1.00

ing water in the main boiler. This steam thus separated is dried out by the heat of the steam surrounding this interior drum L, and also passing through the tubes M so that itis to a certain extent superheated by being separated from the direct contact with the wet steam continually arising within the main boiler.

O is a pipe leading from the opposite end of the drum L to the engine P which itis employed to propel.

Any water which may condense within the drum L can be drawn off by means of a cock Q which is fixed in the. pipe opening out from the drum L through the end of the boiler-A and through the surrounding masonry in which the boiler is set.

The grates R inthe furnace are made hollow or tubular, as shown plainly in Figs. 1 and 5, and the lower parts of the grate bars have openings S made in them through which steam is allowed to escape as will beherei'nafterdescribed. The front ends of the grate bars are closed. The rear ends areopen and are fitted toand supported in openings T, Fig. 4, made in the front wall of a chamber U. Exhaust steam from the cylinder is ledthrough apipe or pipes V and is delivered into the chamber U through distributing nozzles a fixed upon the end of the pipe V so that. steanr delivered into this chamber will pass into the hollow grate bars R and discharge through the passages S in these bars, and-thus'produce a vacuum that will draw the smoke do-wnwa-rdly-from-thecombustion-chamber; Below each bar is a plate b extendinglongitud inally, and suitably supported so as to receive the impact of steam dischargin g through the open: ings in the lower part of the grate, and the st eam is spread and distributed by its impact against these plates and thence with any smoke or unco-nsu-med gases which have been drawn d'own, rises between the grate bars into the fuel which is supported upon them, while the intense heat of the. fuel will decompose thevapor and produce hydrogen, which serves to increase the heat within the furnace.

Through the masonry which forms therear of the furnace is made an inclined passage c, one end of which opens just above the grate, extending the full width, and theother and rearend opensinto the lower partof the combustionchamber 0, being narrowed about onehalf'at the rear end of this passage, where it also has adownward curvature, asshown at 0, so that the products of combustion, pass ing through the passage, are thrown downward at this point before beingdelivered into the chamber 0, and move more rapidly by reason of the concentration. Above this passage cis a cha-mberd situated beneaththeboiler and into this chamber opens pipes e; bringing exhaust steam frdm the cylindersv and having jet nozzles f upon their ends so that the steam is distributed through the chamber 01. Inclined passages g are made through the bottom of this chamber and opening into the passagecso that the steam which is super-heated by its discharge into this chamber, is delivered through these passages g and mingles with the products of combustion in the inclined passage 0 c. The inclination of the passages g is such that the discharge is in the direction of the flow of the current within the chamber 0, and they thus assistin the draft.

h are side passages made in the masonry chamber (1 from which it passes through the passages g as previously described.

2' is a pipe leading from the exhaust of the engine and connecting with one of the four lowermost fl ues D of the boiler, as shown in Figs. 1 aud t. As'the bottom of aboiler is alwayscooler than the upper part, or even the exhaust steam, this steam is returned back and forward through these fines, and its heat is imparted to the water in the lower part of the boiler,.after which it escapes through the discharge nozzle It. By this means a part of the exhaust steam is utilized to impart heat I to the cooler water in the bottomof the boiler, and a part; to assist. in the combustion of the fuel and in the draft. through various parts of the heat passages. of thefurnaceandi boiler, and by means of these steam jets the draft can be increased or diminished atwi-ll, the

whole producing a very perfect and complete means for generati-ng'steam.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A main boiler having fines or heat passages in the lower and middle section,' and supplemental tubes of larger diameter interposed between the lower and middle section with electrical coilsfixedi within them-through which a current of electricity may bepassed so as to heat the tubes. by reason of a resistance within the coils said coils being removable end wise' through: oneend of the furnace, a drum contained within the steam space of theboiler having tubes'extending through it for the free circulation of steam, pipes by which steam is. admitted into the lower portionof the drum firom the upper part of the main boiler and delivered from the opposite end to pass to the engin'e.

2. An engine-boiler containing dues for the passage of the furnace-heat, and front and rear combustion chambers with which said fliues connect, and a drum: contained within the steam spacein the-upper part of the'boil'ena furnace for the reception of fuel. having hollow grate bars-closed at one end; and communicating atthe other end with a transverse ch-amber, into which exhaust steam from the engineisdelivered, openings in thelower part ot the grate barsthrough which a portion of said steam: is dischargedinto the ash-pit, and

distributing plates'beneath' the bars whereby it is distributed so as to arise between the bars into the incandescent fuel thereon, a converging passage leading from the furnace to the rear combustion chamber, a chamber situated above said passage between it and the rear portion of the boiler, pipes by which eX- haust steam is delivered into said chamber, inclined passages through which said steam is discharged into the converging passage leading from the furnace to the rear combustion chamber.

3. A boiler consisting of a main outer shell set in masonry having combustion chambers at both ends, and a furnace beneath, a passage by which products of combustion are led from the furnace to the rear combustion chamber, and a means comprising a chamber into which exhaust steam is admitted, having inclined passages discharging into the passage from the furnace, for mingling exhaust steam with said products of combustion, a movable damperor partition by which the rear combustion chamber may be separated into two parts, one above the other, lines through the lower part of the main shell of the boiler through which the products of combustion are 2 5 EUGENE SI-IYDEOKER.

Witnesses:

S. H. NoURsn, GEO. II. STRONG. 

